I need to run a service (always in background, I want the service constantly checking even if the application is closed) that control the proximity sensor status, and when it's covered launch an activity. I tried but I had error. Any examples of something like this?
P.S. In my AndroidManifest I added:
<service
android:name="xxx.xxxxx.xxxxx.MyService"
android:enabled="true" />
Here my MyService.java: (Eclipse don't report any error but when I try it on my device, apps give a force close.)
import android.app.Service;
import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.IBinder;
import android.widget.Toast;
public class MyService extends Service implements SensorEventListener {
Sensor proxSensor;
SensorManager sm;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
Toast.makeText(this, "Service Created", Toast.LENGTH_LONG).show();
sm=(SensorManager)getSystemService(SENSOR_SERVICE);
proxSensor=sm.getDefaultSensor(Sensor.TYPE_PROXIMITY);
sm.registerListener(this, proxSensor, SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
// TODO Auto-generated method stub
Intent panel = new Intent(this, Panel.class);
startActivity(panel);
}
@Override
public void onDestroy() {
Toast.makeText(this, "Service Stopped", Toast.LENGTH_LONG).show();
}
@Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
}
}
And here my Main.java :
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.lino99.smartTask.R;
public class Main extends Activity implements OnClickListener {
Button buttonStart, buttonStop;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStart = (Button) findViewById(R.id.buttonStart);
buttonStop = (Button) findViewById(R.id.buttonStop);
buttonStart.setOnClickListener(this);
buttonStop.setOnClickListener(this);
}
public void onClick(View src) {
switch (src.getId()) {
case R.id.buttonStart:
startService(new Intent(this, MyService.class));
break;
case R.id.buttonStop:
stopService(new Intent(this, MyService.class));
break;
}
}
}
ok here are few changes in your code that should clear your errors and make your service ongoing and your proximity sensor responsive:
this is how your service should look like:
@Override
public void onCreate() {//onCreat shouldn't be used for sensor u should use onStartCommand
Toast.makeText(this, "Service Created", Toast.LENGTH_LONG).show();
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
// TODO Auto-generated method stub
//here u should use the following code otherwise your sensor will be crazy
if(event.values[0] == 0){
Intent panel = new Intent(this, Panel.class);
startActivity(panel);
}
}
@Override
public void onDestroy() {//here u should unregister sensor
Toast.makeText(this, "Service Stopped", Toast.LENGTH_LONG).show();
sm.unregisterListener(this);
}
@Override//here u should register sensor and write onStartCommand not onStart
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
sm=(SensorManager)getSystemService(SENSOR_SERVICE);
proxSensor=sm.getDefaultSensor(Sensor.TYPE_PROXIMITY);
sm.registerListener(this, proxSensor, SensorManager.SENSOR_DELAY_NORMAL);
//here u should make your service foreground so it will keep working even if app closed
NotificationManager mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Intent bIntent = new Intent(MyService.this, MainActivity.class);
PendingIntent pbIntent = PendingIntent.getActivity(MyService.this, 0 , bIntent, 0);
NotificationCompat.Builder bBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("Title")
.setContentText("Subtitle")
.setAutoCancel(true)
.setOngoing(true)
.setContentIntent(pbIntent);
barNotif = bBuilder.build();
this.startForeground(1, barNotif);
//then you should return sticky
return Service.START_STICKY;
}
}
Ok now try the code and let me know how it works for you, hope I helped.